#!/usr/bin/env python

# Copyright 2012 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Base Handler to provide Catch-All Exception Handling."""

import jinja2
import logging
import os
import webapp2

__author__ = 'Maciej Machulak'
__maintainer__ = 'Maciej Machulak'
__email__ = 'mmachulak@google.com'

__copyright__ = 'Copyright 2012, Google Inc.'
__license__ = 'Apache License 2.0'
__version__ = '0.2'
__status__ = 'Prototype'

jinja_environment = jinja2.Environment(
  loader=jinja2.FileSystemLoader(
    os.path.join(os.path.dirname(__file__),'templates/')))


class BaseHandler(webapp2.RequestHandler):
  """Base Handler to provide Catch-All Exception Handling."""

  def handle_exception(self, exception, debug_mode):
    """Handles exception by logging it and returning with 500 and a page."""

    logging.exception(exception)
    self.error(500)
    values = {}
    template = jinja_environment.get_template('error.html')
    self.response.out.write(template.render(values))
